Nickelodeon has some special events lined up to help celebrate its 25th birthday – unfolding over three straight weeks next month.

“U-Pick Live” will be “supersized” from June 1-4 (5-7 p.m.), 7-11 (5-7:30 p.m.) and 14-18 (5-8 p.m.) and will air from New York, Orlando and Hollywood, respectively, with over 300 kids joining in the fun.

In addition, Nick will air new episodes of “The Fairly OddParents,” “Jimmy Neutron,” “All Grown Up” and other shows every Monday- Friday beginning 6:30 p.m.

* ABC’s “World News Tonight with Peter Jennings” beat the “NBC Nightly News” last week in total viewers (8.9 million vs. 8.7 million). Brian Williams subbed for Tom Brokaw last Friday. And John Green was named EP of the weekend edition of “Good Morning America.”

* FX has signed a deal with XM Satellite Radio, which will present the second-season premiere of “Nip/Tuck” commercial-free on Tuesday, June 22 (10 p.m.).

* Sheila MacVicar is joining CBS News as a London- based correspondent.

* Paramount has donated the entire “Frasier” series (264 episodes) to The Museum of Television & Radio here and in L.A.

* Gianni Russo, Carlo in “The Godfather,” reveals on Court TV’s “Hollywood Heat” what it was like on the set of the classic movie (11:30 p.m. Thursday).

* Saturday: Ch. 11’s Vanessa Tyler emcees the National Council of Negro Women’s Annual Bethune Recognition Program at the Hilton Woodbridge (N.J.).

* Congrats to Mike O’Gara, who retired last week after 44 years in the biz, including 23 years as “ET’s” exec in charge of production.